X-Git-Url: http://wagnertech.de/git?a=blobdiff_plain;f=SL%2FController%2FRequirementSpecItem.pm;h=1c714ffe48ae75af20990c0998a6b85d09da71c0;hb=5474d397bbc42ffaea0b51ebb4bb9a4c7afaa881;hp=6ddf3a63abb1cb0f908ed74200127ead12ce9e1a;hpb=54daa586799871ce5ede8f628a03ea55a9660cf5;p=kivitendo-erp.git

diff --git a/SL/Controller/RequirementSpecItem.pm b/SL/Controller/RequirementSpecItem.pm
index 6ddf3a63a..1c714ffe4 100644
--- a/SL/Controller/RequirementSpecItem.pm
+++ b/SL/Controller/RequirementSpecItem.pm
@@ -4,78 +4,506 @@ use strict;
 
 use parent qw(SL::Controller::Base);
 
+use Carp;
+use List::MoreUtils qw(apply);
+use List::Util qw(first);
 use Time::HiRes ();
 
+use SL::Clipboard;
+use SL::Controller::Helper::RequirementSpec;
 use SL::DB::RequirementSpec;
+use SL::DB::RequirementSpecComplexity;
 use SL::DB::RequirementSpecItem;
+use SL::DB::RequirementSpecPredefinedText;
+use SL::DB::RequirementSpecRisk;
 use SL::Helper::Flash;
 use SL::JSON;
 use SL::Locale::String;
+use SL::Presenter::Text qw(truncate);
 
 use Rose::Object::MakeMethods::Generic
 (
- scalar => [ qw(requirement_spec item) ],
+  scalar                  => [ qw(item visible_item visible_section clicked_item sections) ],
+  'scalar --get_set_init' => [ qw(complexities risks predefined_texts) ],
 );
 
-# __PACKAGE__->run_before('load_requirement_spec');
-__PACKAGE__->run_before('load_requirement_spec_item', only => [qw(dragged_and_dropped)]);
+__PACKAGE__->run_before('check_auth');
+__PACKAGE__->run_before('load_requirement_spec_item', only => [ qw(dragged_and_dropped ajax_update ajax_edit ajax_delete ajax_flag ajax_copy) ]);
+__PACKAGE__->run_before('init_visible_section');
 
 #
 # actions
 #
 
-sub action_new {
+sub action_ajax_list {
   my ($self) = @_;
 
-  eval {
-    my $type         = ($::form->{item_type} || '') =~ m/^ (?: section | (?: sub-)? function-block ) $/x ? $::form->{item_type} : die "Invalid item_type";
-    $self->{item}    = SL::DB::RequirementSpecItem->new(requirement_spec_id => $::form->{requirement_spec_id});
-    my $section_form = $self->presenter->render("requirement_spec_item/_${type}_form", id => create_random_id(), title => t8('Create a new section'));
+  if (!$::form->{clicked_id}) {
+    # Clicked on "sections" in the tree. Do nothing.
+    return $self->render($self->js);
+  }
+
+  my $clicked_item = SL::DB::RequirementSpecItem->new(id => $::form->{clicked_id})->load;
+  $self->item($clicked_item->section);
 
-    $self->render(\to_json({ status => 'ok', html => $section_form }), { type => 'json' });
-    1;
-  } or do {
-    $self->render(\to_json({ status => 'failed', error => "Exception:\n" . format_exception() }), { type => 'json' });
+  if (!$self->visible_section || ($self->visible_section->id != $self->item->id)) {
+    $self->render_list($self->item, $clicked_item);
+  } else {
+    $self->select_node($clicked_item);
   }
+
+  $self->render($self->js);
 }
 
-sub action_create {
+sub insert_new_item_in_section_view {
   my ($self) = @_;
 
-  my $type = ($::form->{item_type} || '') =~ m/^ (?: section | (?: sub-)? function-block ) $/x ? $::form->{item_type} : die "Invalid item_type";
+  $self->js->hide('#section-list-empty');
+
+  my $new_type  = $self->item->item_type;
+  my $id_prefix = $new_type eq 'sub-function-block' ? 'sub-' : '';
+  my $template  = 'requirement_spec_item/_' . (apply { s/-/_/g; $_ } $new_type);
+  my $html      = "" . $self->render($template, { output => 0 }, requirement_spec_item => $self->item);
+  my $next_item = $self->item->get_next_in_list;
 
-  $self->render(\to_json({ status => 'failed', error => 'not good, not good' }), { type => 'json' });
+  if ($next_item) {
+    $self->js->insertBefore($html, '#' . $id_prefix . 'function-block-' . $next_item->id);
+  } else {
+    my $parent_is_section = $self->item->parent->item_type eq 'section';
+    $self->js->appendTo($html, $parent_is_section ? '#section-list' : '#sub-function-block-container-' . $self->item->parent_id);
+    $self->js->show('#sub-function-block-container-' . $self->item->parent_id) if !$parent_is_section;
+  }
+
+  $self->replace_bottom($self->item->parent) if $new_type eq 'sub-function-block';
 }
 
 sub action_dragged_and_dropped {
-  my ($self)       = @_;
+  my ($self)              = @_;
 
-  $::lxdebug->dump(0, "form", $::form);
+  my $position            = $::form->{position} =~ m/^ (?: before | after | last ) $/x ? $::form->{position}                                             : die "Unknown 'position' parameter";
+  my $dropped_item        = $::form->{dropped_id}                                  ? SL::DB::RequirementSpecItem->new(id => $::form->{dropped_id})->load : undef;
 
-  my $dropped_item = SL::DB::RequirementSpecItem->new(id => $::form->{dropped_id})->load || die "No such dropped item";
-  my $position     = $::form->{position} =~ m/^ (?: before | after | last ) $/x ? $::form->{position} : die "Unknown 'position' parameter";
+  my $old_visible_section = $self->visible_section ? $self->visible_section : undef;
+  my $old_parent_id       = $self->item->parent_id;
+  my $old_type            = $self->item->item_type;
+  my $new_type            = !$dropped_item ? 'section' : $position =~ m/before|after/ ? $dropped_item->item_type : $dropped_item->child_type;
 
-  $self->item->db->do_transaction(sub {
+  $self->item->db->with_transaction(sub {
     $self->item->remove_from_list;
-    $self->item->parent_id($position =~ m/before|after/ ? $dropped_item->parent_id : $dropped_item->id);
-    $self->item->add_to_list(position => $position, reference => $dropped_item->id);
+    $self->item->parent_id($position =~ m/before|after/ ? $dropped_item->parent_id : $dropped_item->id) if $dropped_item;
+    $self->item->item_type($new_type);
+    $self->item->add_to_list(position => $position, reference => $::form->{dropped_id} || undef);
   });
 
-  $self->render(\'', { type => 'json' });
+  return $self->invalidate_version->render if !$old_visible_section || ($new_type eq 'section');
+
+  # From here on $old_visible_section is definitely set.
+
+  $self->item(SL::DB::RequirementSpecItem->new(id => $self->item->id)->load);
+  my $new_section         = $self->item->section;
+  my $new_visible_section = SL::DB::RequirementSpecItem->new(id => $self->visible_item->id)->load->section;
+
+  my $old_parent  = SL::DB::RequirementSpecItem->new(id => $old_parent_id)->load;
+  my $old_section = $old_parent->section;
+
+  # Section debug info:
+  # $::lxdebug->message(0, "old sec ID " . $old_section->id . " new " . $new_section->id . " old visible " . $old_visible_section->id . " new visible " . $new_visible_section->id
+  #                       . " PARENT: old " . $old_parent->id . " new " . $self->item->parent_id . '/' . $self->item->parent->id);
+
+  # Item debug info:
+  # $::lxdebug->message(0, 'item id: ' . $self->item->id . " new type: $new_type old type: $old_type #old children: " . scalar(@{ $old_parent->children }));
+
+  if ($old_visible_section->id != $new_visible_section->id) {
+    # The currently visible item has been dragged to a different section.
+    $self->invalidate_version;
+    return $self->render_list($new_section, $self->item)
+      ->render($self);
+  }
+
+  if ($old_visible_section->id == $old_section->id) {
+    my $id_prefix = $old_type eq 'sub-function-block' ? 'sub-' : '';
+    $self->js->remove('#' . $id_prefix . 'function-block-' . $self->item->id);
+
+    if ($old_type eq 'sub-function-block') {
+      $self->replace_bottom($old_parent) ;
+      $self->js->hide('#sub-function-block-container-' . $old_parent->id) if 0 == scalar(@{ $old_parent->children });
+
+    } elsif (0 == scalar(@{ $old_section->children })) {
+      $self->js->show('#section-list-empty');
+    }
+  }
+
+  if ($old_visible_section->id == $new_section->id) {
+    $self->insert_new_item_in_section_view($self->js);
+  }
+
+  # $::lxdebug->dump(0, "js", $self->js->to_array);
+
+  $self->invalidate_version->render($self);
+}
+
+sub action_ajax_add_section {
+  my ($self, %params) = @_;
+
+  die "Missing parameter 'requirement_spec_id'" if !$::form->{requirement_spec_id};
+
+  $self->item(SL::DB::RequirementSpecItem->new(requirement_spec_id => $::form->{requirement_spec_id}, item_type => 'section'));
+
+  my $insert_after = $::form->{id} ? SL::DB::RequirementSpecItem->new(id => $::form->{id})->load->section->id : undef;
+  my $html         = $self->render('requirement_spec_item/_section_form', { output => 0 }, id_base => 'new_section', insert_after => $insert_after);
+
+  $self->js
+    ->remove('#new_section_form')
+    ->hide('#column-content > *')
+    ->appendTo($html, '#column-content')
+    ->focus('#new_section_title')
+    ->reinit_widgets
+    ->render($self);
+}
+
+sub action_ajax_add_function_block {
+  my ($self, %params) = @_;
+
+  return $self->add_function_block('function-block');
+}
+
+sub action_ajax_add_sub_function_block {
+  my ($self, %params) = @_;
+
+  return $self->add_function_block('sub-function-block');
+}
+
+sub action_ajax_create {
+  my ($self, %params) = @_;
+
+  my $prefix          = $::form->{form_prefix} || die "Missing parameter 'form_prefix'";
+  my $attributes      = $::form->{$prefix}     || die "Missing parameter group '${prefix}'";
+  my $insert_after    = delete $attributes->{insert_after};
+
+  if (!$attributes->{parent_id}) {
+    $attributes->{order_part_id} ||= $::instance_conf->get_requirement_spec_section_order_part_id;
+  }
+
+  my @errors = $self->item(SL::DB::RequirementSpecItem->new(%{ $attributes }))->validate;
+  return $self->js->error(@errors)->render($self) if @errors;
+
+  $self->item->save;
+  $self->item->add_to_list(position => 'after', reference => $insert_after) if $insert_after;
+
+  my $type = $self->item->item_type;
+
+  if ($type eq 'section') {
+    my $node = $self->item->presenter->jstree_data;
+    $self->invalidate_version;
+    $self->render_list($self->item)
+      ->hide('#section-list-empty')
+      ->jstree->create_node('#tree', $insert_after ? ('#fb-' . $insert_after, 'after') : ('#sections', 'last'), $node)
+      ->jstree->select_node('#tree', '#fb-' . $self->item->id);
+    return $self->add_new_item_form_after_create
+      ->reinit_widgets
+      ->render($self);
+  }
+
+  my $template = 'requirement_spec_item/_' . (apply { s/-/_/g; $_ } $type);
+  my $html     = $self->render($template, { output => 0 }, requirement_spec_item => $self->item, id_prefix => $type eq 'function-block' ? '' : 'sub-');
+  my $node     = $self->item->presenter->jstree_data;
+
+  $self->js
+    ->replaceWith('#' . $prefix . '_form', $html)
+    ->hide('#section-list-empty')
+    ->jstree->create_node('#tree', $insert_after ? ('#fb-' . $insert_after, 'after') : ('#fb-' . $self->item->parent_id, 'last'), $node)
+    ->reinit_widgets
+    ->jstree->select_node('#tree', '#fb-' . $self->item->id);
+
+  $self->replace_bottom($self->item->parent) if $type eq 'sub-function-block';
+
+  $self->add_new_item_form_after_create;
+
+  $self->invalidate_version->render($self);
+}
+
+sub action_ajax_edit {
+  my ($self, %params) = @_;
+
+  $self->item(SL::DB::RequirementSpecItem->new(id => $::form->{id})->load);
+
+  if (!$self->is_item_visible) {
+    # Show section/item to edit if it is not visible.
+
+    my $html = $self->render('requirement_spec_item/_section', { output => 0 }, requirement_spec_item => $self->item->section);
+    $self->set_function_blocks_tab_menu_class(class => 'section-context-menu')
+      ->html('#column-content', $html);
+  }
+
+  if ($self->item->item_type =~ m/section/) {
+    # Edit the section header, not an item.
+    my $html = $self->render('requirement_spec_item/_section_form', { output => 0 });
+
+    $self->js
+      ->hide('#section-header-' . $self->item->id)
+      ->remove("#edit_section_form")
+      ->insertAfter($html, '#section-header-' . $self->item->id)
+      ->jstree->select_node('#tree', '#fb-' . $self->item->id)
+      ->val('#current_content_type', 'section')
+      ->val('#current_content_id',   $self->item->id)
+      ->reinit_widgets
+      ->focus("#edit_section_title")
+      ->render($self);
+    return;
+  }
+
+  # Edit a function block or a sub function block
+  my @dependencies          = $self->create_dependencies;
+  my @selected_dependencies = map { $_->id } @{ $self->item->dependencies };
+
+  my $html                  = $self->render('requirement_spec_item/_function_block_form', { output => 0 }, DEPENDENCIES => \@dependencies, SELECTED_DEPENDENCIES => \@selected_dependencies);
+  my $id_base               = 'edit_function_block_' . $self->item->id;
+  my $content_top_id        = '#' . $self->item->item_type . '-content-top-' . $self->item->id;
+
+  $self->js
+    ->hide($content_top_id)
+    ->remove("#${id_base}_form")
+    ->insertAfter($html, $content_top_id)
+    ->run('kivi.requirement_spec.init_function_block_keypress_events', "${id_base}_form")
+    ->jstree->select_node('#tree', '#fb-' . $self->item->id)
+    ->val('#current_content_type', $self->item->item_type)
+    ->val('#current_content_id', $self->item->id)
+    ->reinit_widgets
+    ->focus("#${id_base}_description")
+    ->render($self);
+}
+
+sub action_ajax_update {
+  my ($self, %params) = @_;
+
+  my $prefix     = $::form->{form_prefix} || die "Missing parameter 'form_prefix'";
+  my $attributes = $::form->{$prefix}     || {};
+
+  foreach (qw(requirement_spec_id parent_id position)) {
+    delete $attributes->{$_} if !defined $attributes->{$_};
+  }
+
+  my @errors = $self->item->assign_attributes(%{ $attributes })->validate;
+  return $self->js->error(@errors)->render($self) if @errors;
+
+  $self->item->save;
+
+  my $type = $self->item->item_type;
+
+  if ($type eq 'section') {
+    # Updated section, now update section header.
+
+    my $html = $self->render('requirement_spec_item/_section_header', { output => 0 }, requirement_spec_item => $self->item);
+
+    return $self->invalidate_version
+      ->remove('#edit_section_form')
+      ->html('#section-header-' . $self->item->id, $html)
+      ->show('#section-header-' . $self->item->id)
+      ->jstree->rename_node('#tree', '#fb-' . $self->item->id, $self->item->presenter->tree_node_title)
+      ->prop('#fb-' . $self->item->id . ' a', 'title', $self->item->content_excerpt)
+      ->addClass('#fb-' . $self->item->id . ' a', 'tooltip')
+      ->reinit_widgets
+      ->render($self);
+  }
+
+  # Updated function block or sub function block. Update (sub)
+  # function block and potentially the bottom of the parent function
+  # block.
+
+  my $id_prefix    = $type eq 'function-block' ? '' : 'sub-';
+  my $html_top     = $self->render('requirement_spec_item/_function_block_content_top',    { output => 0 }, requirement_spec_item => $self->item, id_prefix => $id_prefix);
+  $id_prefix      .= 'function-block-content-';
+
+  $self->js
+    ->remove('#' . $prefix . '_form')
+    ->replaceWith('#' . $id_prefix . 'top-' . $self->item->id, $html_top)
+    ->prop('#fb-' . $self->item->id . ' a', 'title', $self->item->content_excerpt)
+    ->addClass('#fb-' . $self->item->id . ' a', 'tooltip')
+    ->reinit_widgets
+    ->jstree->rename_node('#tree', '#fb-' . $self->item->id, $self->item->presenter->tree_node_title);
+
+  $self->replace_bottom($self->item, id_prefix => $id_prefix);
+  $self->replace_bottom($self->item->parent) if $type eq 'sub-function-block';
+
+  $self->invalidate_version->render($self);
+}
+
+sub action_ajax_delete {
+  my ($self) = @_;
+
+  my $full_list = $self->item->get_full_list;
+
+  $self->item->delete;
+
+  if ($self->visible_section && ($self->visible_section->id == $self->item->id)) {
+    # Currently visible section is deleted.
+
+    my $new_section = first { $_->id != $self->item->id } @{ $self->item->requirement_spec->sections };
+    if ($new_section) {
+      $self->render_list($new_section);
+
+    } else {
+      my $html = $self->render('requirement_spec_item/_no_section', { output => 0 });
+      $self->set_function_blocks_tab_menu_class(class => 'section-context-menu')
+        ->html('#column-content',      $html)
+        ->val('#current_content_type', '')
+        ->val('#current_content_id',   '')
+    }
+
+  } elsif ($self->is_item_visible) {
+    # Item in currently visible section is deleted.
+
+    my $type = $self->item->item_type;
+    $self->js->remove('#edit_function_block_' . $self->item->id . '_form')
+             ->remove('#' . $type . '-' . $self->item->id);
+
+    $self->replace_bottom($self->item->parent_id) if $type eq 'sub-function-block';
+
+    if (1 == scalar @{ $full_list }) {
+      if ($type eq 'function-block') {
+        $self->js->show('#section-list-empty');
+      } elsif ($type eq 'sub-function-block') {
+        $self->js->hide('#sub-function-block-container-' . $self->item->parent_id);
+      }
+    }
+  }
+
+  $self->invalidate_version
+    ->jstree->delete_node('#tree', '#fb-' . $self->item->id)
+    ->render($self);
+}
+
+sub action_ajax_flag {
+  my ($self) = @_;
+
+  $self->item->update_attributes(is_flagged => !$self->item->is_flagged);
+
+  $self->js
+   ->action_if($self->is_item_visible, 'toggleClass', '#' . $self->item->item_type . '-' . $self->item->id, 'flagged')
+   ->toggleClass('#fb-' . $self->item->id, 'flagged')
+   ->render($self);
+}
+
+sub action_ajax_copy {
+  my ($self, %params) = @_;
+
+  SL::Clipboard->new->copy($self->item);
+  $self->render($self->js);
+}
+
+sub determine_paste_position {
+  my ($self) = @_;
+
+  if ($self->item->item_type eq 'section') {
+    # Sections are always pasted either directly after the
+    # clicked-upon section or at the very end.
+    return $self->clicked_item ? (undef, $self->clicked_item->section->id) : ();
+
+  } elsif ($self->item->item_type eq 'function-block') {
+    # A function block:
+    # - paste on section list: insert into last section as last element
+    # - paste on section: insert into that section as last element
+    # - paste on function block: insert after clicked-upon element
+    # - paste on sub function block: insert after parent function block of clicked-upon element
+    return !$self->clicked_item                                ? ( $self->sections->[-1]->id,              undef                          )
+         :  $self->clicked_item->item_type eq 'section'        ? ( $self->clicked_item->id,                undef                          )
+         :  $self->clicked_item->item_type eq 'function-block' ? ( $self->clicked_item->parent_id,         $self->clicked_item->id        )
+         :                                                       ( $self->clicked_item->parent->parent_id, $self->clicked_item->parent_id );
+
+  } else {                      # sub-function-block
+    # A sub function block:
+    # - paste on section list: promote to function block and insert into last section as last element
+    # - paste on section: promote to function block and insert into that section as last element
+    # - paste on function block: insert as last element in clicked-upon element
+    # - paste on sub function block: insert after clicked-upon element
+
+    # Promote sub function blocks to function blocks when pasting on a
+    # section or the section list.
+    $self->item->item_type('function-block') if !$self->clicked_item || ($self->clicked_item->item_type eq 'section');
+
+    return !$self->clicked_item                                ? ( $self->sections->[-1]->id,      undef                   )
+         :  $self->clicked_item->item_type eq 'section'        ? ( $self->clicked_item->id,        undef                   )
+         :  $self->clicked_item->item_type eq 'function-block' ? ( $self->clicked_item->id,        undef                   )
+         :                                                       ( $self->clicked_item->parent_id, $self->clicked_item->id );
+  }
+}
+
+sub assign_requirement_spec_id_rec {
+  my ($self, $item) = @_;
+
+  $item->assign_attributes(requirement_spec_id => $::form->{requirement_spec_id}, fb_number => undef);
+  $self->assign_requirement_spec_id_rec($_) for @{ $item->children || [] };
+
+  return $item;
+}
+
+sub create_and_insert_node_rec {
+  my ($self, $item, $new_parent_id, $insert_after) = @_;
+
+  my $node = $item->presenter->jstree_data;
+  $self->js->jstree->create_node('#tree', $insert_after ? ('#fb-' . $insert_after, 'after') : $new_parent_id ? ('#fb-' . $new_parent_id, 'last') : ('#sections', 'last'), $node);
+
+  $self->create_and_insert_node_rec($_, $item->id) for @{ $item->children || [] };
+
+  $self->js->jstree->open_node('#tree', '#fb-' . $item->id);
+}
+
+sub action_ajax_paste {
+  my ($self, %params) = @_;
+
+  my $copied = SL::Clipboard->new->get_entry(qr/^RequirementSpecItem$/);
+
+  if (!$copied) {
+    return $self->js->error(t8("The clipboard does not contain anything that can be pasted here."))
+                    ->render($self);
+  }
+
+  $self->item($self->assign_requirement_spec_id_rec($copied->to_object));
+  my $req_spec = SL::DB::RequirementSpec->new(id => $::form->{requirement_spec_id})->load;
+  $self->sections($req_spec->sections);
+
+  if (($self->item->item_type ne 'section') && !@{ $self->sections }) {
+    return $self->js->error(t8("You cannot paste function blocks or sub function blocks if there is no section."))
+                    ->render($self);
+  }
+
+  $self->clicked_item($::form->{id} ? SL::DB::RequirementSpecItem->new(id => $::form->{id})->load : undef);
+
+  my ($new_parent_id, $insert_after) = $self->determine_paste_position;
+
+  # Store result in database.
+  $self->item->update_attributes(parent_id => $new_parent_id);
+  $self->item->add_to_list(position => 'after', reference => $insert_after) if $insert_after;
+
+  # Update the tree: create the node for all pasted objects.
+  $self->create_and_insert_node_rec($self->item, $new_parent_id, $insert_after);
+
+  # Pasting the very first section?
+  if (!@{ $self->sections }) {
+    my $html = $self->render('requirement_spec_item/_section', { output => 0 }, requirement_spec_item => $self->item);
+    $self->set_function_blocks_tab_menu_class(class => 'section-context-menu')
+         ->html('#column-content', $html)
+         ->jstree->select_node('#tree', '#fb-' . $self->item->id)
+  }
+
+  # Update the current view if required.
+  $self->insert_new_item_in_section_view($self->js) if $self->is_item_visible;
+
+  $self->invalidate_version->render($self);
 }
 
 #
 # filters
 #
 
-sub load_requirement_spec {
+sub check_auth {
   my ($self) = @_;
-  $self->requirement_spec(SL::DB::RequirementSpec->new(id => $::form->{requirement_spec_id})->load || die "No such requirement spec");
+  $::auth->assert('requirement_spec_edit');
 }
 
 sub load_requirement_spec_item {
   my ($self) = @_;
-  $self->item(SL::DB::RequirementSpecItem->new(id => $::form->{id})->load || die "No such requirement spec item");
+  $self->item(SL::DB::RequirementSpecItem->new(id => $::form->{id})->load);
 }
 
 #
@@ -90,4 +518,209 @@ sub format_exception {
   return join "\n", (split m/\n/, $@)[0..4];
 }
 
+sub init_complexities {
+  my ($self) = @_;
+
+  return SL::DB::Manager::RequirementSpecComplexity->get_all_sorted;
+}
+
+sub init_risks {
+  my ($self) = @_;
+
+  return SL::DB::Manager::RequirementSpecRisk->get_all_sorted;
+}
+
+sub init_predefined_texts {
+  return SL::DB::Manager::RequirementSpecPredefinedText->get_all_sorted(where => [ useable_for_sections => 1 ]);
+}
+
+sub replace_bottom {
+  my ($self, $item_or_id) = @_;
+
+  my $item      = (ref($item_or_id) ? $item_or_id : SL::DB::RequirementSpecItem->new(id => $item_or_id))->load;
+  my $id_prefix = $item->item_type eq 'function-block' ? '' : 'sub-';
+  my $html      = $self->render('requirement_spec_item/_function_block_content_bottom', { output => 0 }, requirement_spec_item => $item, id_prefix => $id_prefix);
+  return $self->js->replaceWith('#' . $id_prefix . 'function-block-content-bottom-' . $item->id, $html);
+}
+
+sub render_list {
+  my ($self, $item, $item_to_select) = @_;
+
+  my $html = $self->render('requirement_spec_item/_section', { output => 0 }, requirement_spec_item => $item);
+  $self->set_function_blocks_tab_menu_class(class => 'section-context-menu')
+       ->html('#column-content', $html);
+  $self->select_node($item_to_select || $item);
+}
+
+sub select_node {
+  my ($self, $item) = @_;
+
+  $self->js
+    ->val( '#current_content_type', $item->item_type)
+    ->val( '#current_content_id',   $item->id)
+    ->jstree->select_node('#tree', '#fb-' . $item->id);
+}
+
+sub create_dependency_item {
+  my $self = shift;
+  [ $_[0]->id, truncate(join(' ', grep { $_ } ($_[1], $_[0]->fb_number, $_[0]->description_as_stripped_html))) ];
+}
+
+sub create_dependencies {
+  my ($self) = @_;
+
+  return map { [ $_->fb_number . ' ' . $_->title,
+                 [ map { ( $self->create_dependency_item($_),
+                           map { $self->create_dependency_item($_, '->') } @{ $_->children_sorted })
+                       } @{ $_->children_sorted } ] ]
+             } @{ $self->item->requirement_spec->sections };
+}
+
+sub ensure_section_is_shown {
+  my ($self, %params) = @_;
+
+  return $self->js if $self->is_item_visible;
+
+  # Show section/item to edit if it is not visible.
+  my $new_section = $self->item->section;
+  my $html        = $self->render('requirement_spec_item/_section', { output => 0 }, requirement_spec_item => $new_section);
+
+  return $self->set_function_blocks_tab_menu_class(class => 'section-context-menu')
+    ->html('#column-content', $html)
+    ->val('#current_content_type', 'section')
+    ->val('#current_content_id',   $new_section->id)
+    ->jstree->select_node('#tree', '#fb-' . $new_section->id);
+}
+
+sub add_new_item_form {
+  my ($self, %params) = @_;
+
+  for (qw(insert_position display_reference)) {
+    croak "Missing parameter $_" if !$params{$_};
+  }
+  croak "Missing parameter insert_reference" if ($params{insert_position} eq 'insertAfter') && !$params{insert_reference};
+
+  my $id_base = join('_', 'new_function_block', Time::HiRes::gettimeofday(), int rand 1000000000000);
+  my $html    = $self->render(
+    'requirement_spec_item/_function_block_form',
+    { output => 0 },
+    DEPENDENCIES          => [ $self->create_dependencies ],
+    SELECTED_DEPENDENCIES => [],
+    requirement_spec_item => $self->item,
+    id_base               => $id_base,
+    insert_after          => $params{insert_position} eq 'insertAfter' ? $params{insert_reference} : undef,
+  );
+
+  return $self->js
+    ->action($params{insert_position}, $html, $params{display_reference})
+    ->action_if($self->item->item_type eq 'sub-function-block', 'show', '#sub-function-block-container-' . $self->item->parent_id)
+    ->run('kivi.requirement_spec.init_function_block_keypress_events', "${id_base}_form")
+    ->reinit_widgets
+    ->focus("#${id_base}_description");
+}
+
+sub add_new_item_form_after_create {
+  my ($self, %params) = @_;
+
+  my $created_item    = $self->item;
+
+  my ($new_item_type, $new_parent_id, $insert_position, $insert_reference, $display_reference);
+  if ($created_item->item_type eq 'section') {
+    # $created_item is section, new one will be function-block
+    $new_item_type     = 'function-block';
+    $new_parent_id     = $created_item->id;
+    $insert_position   = 'appendTo';
+    $display_reference = '#section-list';
+
+  } elsif (!$::form->{shift_in_out}) {
+    # $created_item is function-block or sub-function-block, new one will be the same
+    $new_item_type     = $created_item->item_type;
+    $new_parent_id     = $created_item->parent_id;
+    $insert_position   = 'insertAfter';
+    $insert_reference  = $created_item->id;
+    $display_reference = '#' . $created_item->item_type . '-' . $created_item->id;
+
+  } elsif ($created_item->item_type eq 'function-block') {
+    # $created_item is function-block, new one will be sub-function-block
+    $new_item_type     = 'sub-function-block';
+    $new_parent_id     = $created_item->id;
+    $insert_position   = 'appendTo';
+    $display_reference = '#sub-function-block-container-' . $created_item->id;
+
+  } else {
+    # $created_item is sub-function-block, new one will be function-block
+    $new_item_type     = 'function-block';
+    $new_parent_id     = $created_item->parent->parent_id;
+    $insert_position   = 'insertAfter';
+    $insert_reference  = $created_item->parent_id;
+    $display_reference = '#function-block-' . $created_item->parent_id;
+  }
+
+  $::lxdebug->message(LXDebug::DEBUG1(),
+                      "OLD item_type " . $created_item->item_type . " ; NEW item_type $new_item_type ; parent_id $new_parent_id ; " .
+                      "insert_position $insert_position ; insert_reference $insert_reference ; display_reference $display_reference");
+
+  $self->item(SL::DB::RequirementSpecItem->new(
+    requirement_spec_id => $created_item->requirement_spec_id,
+    parent_id           => $new_parent_id,
+    item_type           => $new_item_type,
+  ));
+
+  $self->add_new_item_form(
+    insert_reference  => $insert_reference,
+    insert_position   => $insert_position,
+    display_reference => $display_reference,
+  );
+}
+
+sub add_function_block {
+  my ($self, $new_type) = @_;
+
+  my $clicked_id = $::form->{id} || ($self->visible_item ? $self->visible_item->id : undef);
+
+  die "Invalid new_type '$new_type'"               if $new_type !~ m/^(?:sub-)?function-block$/;
+  die "Missing parameter 'id' and no visible item" if !$clicked_id;
+  die "Missing parameter 'requirement_spec_id'"    if !$::form->{requirement_spec_id};
+
+  my $clicked_item = SL::DB::RequirementSpecItem->new(id => $clicked_id)->load;
+  my $clicked_type = $clicked_item->item_type;
+
+  die "Invalid clicked_type '$clicked_type'" if $clicked_type !~ m/^(?: section | (?:sub-)? function-block )$/x;
+
+  my $case = "${clicked_type}:${new_type}";
+
+  my ($insert_position, $insert_reference, $parent_id, $display_reference)
+    = $case eq 'section:function-block'                ? ( 'appendTo',    $clicked_item->id,        $clicked_item->id,                '#section-list'                  )
+    : $case eq 'function-block:function-block'         ? ( 'insertAfter', $clicked_item->id,        $clicked_item->parent_id,         '#function-block-'               )
+    : $case eq 'function-block:sub-function-block'     ? ( 'appendTo'  ,  $clicked_item->id,        $clicked_item->id,                '#sub-function-block-container-' )
+    : $case eq 'sub-function-block:function-block'     ? ( 'insertAfter', $clicked_item->parent_id, $clicked_item->parent->parent_id, '#function-block-'               )
+    : $case eq 'sub-function-block:sub-function-block' ? ( 'insertAfter', $clicked_item->id,        $clicked_item->parent_id,         '#sub-function-block-'           )
+    :                                                    die "Invalid combination of 'clicked_type (section)/new_type ($new_type)'";
+
+  $display_reference .= $insert_reference if $display_reference =~ m/-$/;
+
+  $self->item(SL::DB::RequirementSpecItem->new(requirement_spec_id => $::form->{requirement_spec_id}, parent_id => $parent_id, item_type => $new_type));
+
+  $self->ensure_section_is_shown;
+  $self->js->show('#sub-function-block-container-' . $parent_id) if $new_type eq 'sub-function-block';
+  $self->add_new_item_form(insert_position => $insert_position, insert_reference => $insert_reference, display_reference => $display_reference);
+
+  $self->js->render;
+}
+
+sub is_item_visible {
+  my ($self, $item) = @_;
+
+  $item ||= $self->item;
+  return $self->visible_section && ($self->visible_section->id == $item->section->id);
+}
+
+sub invalidate_version {
+  my ($self) = @_;
+
+  my $html   = $self->render('requirement_spec/_version', { output => 0 },
+                             requirement_spec => SL::DB::RequirementSpec->new(id => $::form->{requirement_spec_id} || $self->item->requirement_spec_id)->load);
+  return $self->js->html('#requirement_spec_version', $html);
+}
+
 1;